Static Pressure Fans Vs High Air Flow

We are often told by online pundits that you have to use a static pressure fan for your heatsink or radiator and that you have to use an airflow fan to intake or exhaust air from your chassis.

Static pressure fans vs high air flow.

The more obstacles in the way of the air the more static pressure you want. With static pressure fans vs airflow fans the fan blade structure is the main difference between these types of fans. Air flow is the gaseous equivalent to the ampère and static pressure is the equivalent to the volt. Static pressure pressure.

One could also compare the matter to water or any other fluid going trough a wide versus narrow tube. Static pressure is used to evaluate the amount of impact various ventilation system components have on the airflow path within a given system. And when static pressure increases air flow decreases. High airflow fans simply push as much air as possible while static pressure fans are specifically designed to tackle installations with heightened impedance and resistance.

All other components create. Linus explains the difference between high airflow and static p. For mechanical ventilation systems the fans create positive static pressure to move air through a given system. Static pressure fans come with wider blades but the gaps between the main difference has a direct connection with how the fans are optimized because the cooling system works differently.

Much air flowing trough large spaces. The relationship between air flow and static pressure of a fan is shown in the graph above. The more air you can move the more heat you can blow away. High flow low pressure.

As you can see air flow and static pressure have a negative correlation. Static pressure fans are usually best for locations where they have to push air through a tight area such as a hard drive bay or radiator. Moves more air and become louder as it increases in speed the ideal fan would be a low rpm high cfm high static pressure. The 3 points depict possible scenarios where the fan will perform.

Cfm air flow. High flow high pressure. The difference is that static pressure fans have a blade design optimized for good air flow at higher back pressure air flow resistance and often at low back pressures will deliver less air flow than a fan optimized for that latter situation so if you put the flow versus back pressure lines for both designs on the same graph they cross over at some intermediate pressure. There s more to choosing the right pc fan than picking a size noise level and bearing type.